Following his work at Sega, Ogata has gone on to be employed by AMS co., ltd., where he composed music for games developed by Yuke's, Ecole, and a few Japan-exclusive games by C's Ware. He remained there from at least late 1997 to late 2001.

He has also worked with Momo Michishita (better known as simply "momo") on occasion, as she provided the main vocals for "Brand-new World" from Sonic the Hedgehog - Remix (which Ogata arranged) and sang the ending theme of Death Crimson 2, "Maybe someday" (she also voiced the game's protagonist, Yuri Rosenberg).